first commit

pigo/internal/pkgmgr/distribute_theme.go

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+// This file distributes a classified pi theme into pigo's themes directory
+// (#161). Unlike extensions/skills/prompts, pigo has no theme runtime yet, so a
+// theme is simply *stored* under $PIGO_HOME/themes/<name>/ for a future
+// consumer — no launcher, no discovery wiring. Storing it (rather than dropping
+// it) keeps the install/list/uninstall/update lifecycle uniform: the theme has
+// a home, the lockfile records its files, and uninstall can remove it cleanly.
+package pkgmgr
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+// DistributeTheme copies the theme package at pkgDir into the themes directory
+// under a "<name>/" subdirectory. Because pigo has no theme runtime yet, this
+// only stores the theme; there is no discovery step. It returns the absolute
+// paths of every file (and the theme dir) it created, for the lockfile. An
+// unresolvable themes dir is an error.
+func DistributeTheme(pkgDir, name string) ([]string, error) {
+	themesDir := ThemesDir()
+	if themesDir == "" {
+		return nil, fmt.Errorf("pkgmgr: cannot resolve themes dir (PIGO_HOME/home unavailable)")
+	}
+	dest := filepath.Join(themesDir, name)
+	// A stale theme from a prior install must not linger alongside the new one.
+	if err := os.RemoveAll(dest); err != nil {
+		return nil, fmt.Errorf("pkgmgr: clear old theme %q: %w", dest, err)
+	}
+	if err := os.MkdirAll(themesDir, 0o755); err != nil {
+		return nil, fmt.Errorf("pkgmgr: create themes dir: %w", err)
+	}
+	files, err := copyTree(pkgDir, dest)
+	if err != nil {
+		return nil, err
+	}
+	return append(files, dest), nil
+}